| #!/usr/bin/env python |
| # Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| # |
| # Use of this source code is governed by a BSD-style license |
| # that can be found in the LICENSE file in the root of the source |
| # tree. An additional intellectual property rights grant can be found |
| # in the file PATENTS. All contributing project authors may |
| # be found in the AUTHORS file in the root of the source tree. |
| |
| import optparse |
| import os |
| import shutil |
| import subprocess |
| import sys |
| import tempfile |
| |
| |
| SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__)) |
| |
| # Chrome browsertests will throw away stderr; avoid that output gets lost. |
| sys.stderr = sys.stdout |
| |
| |
| def _ParseArgs(): |
| """Registers the command-line options.""" |
| usage = 'usage: %prog [options]' |
| parser = optparse.OptionParser(usage=usage) |
| |
| parser.add_option('--label', type='string', default='MY_TEST', |
| help=('Label of the test, used to identify different ' |
| 'tests. Default: %default')) |
| parser.add_option('--ref_video', type='string', |
| help='Reference video to compare with (YUV).') |
| parser.add_option('--test_video', type='string', |
| help=('Test video to be compared with the reference ' |
| 'video (YUV).')) |
| parser.add_option('--frame_analyzer', type='string', |
| help='Path to the frame analyzer executable.') |
| parser.add_option('--barcode_decoder', type='string', |
| help=('Path to the barcode decoder script. By default, we ' |
| 'will assume we can find it in barcode_tools/' |
| 'relative to this directory.')) |
| parser.add_option('--ffmpeg_path', type='string', |
| help=('The path to where the ffmpeg executable is located. ' |
| 'If omitted, it will be assumed to be present in the ' |
| 'PATH with the name ffmpeg[.exe].')) |
| parser.add_option('--zxing_path', type='string', |
| help=('The path to where the zxing executable is located. ' |
| 'If omitted, it will be assumed to be present in the ' |
| 'PATH with the name zxing[.exe].')) |
| parser.add_option('--stats_file_ref', type='string', default='stats_ref.txt', |
| help=('Path to the temporary stats file to be created and ' |
| 'used for the reference video file. ' |
| 'Default: %default')) |
| parser.add_option('--stats_file_test', type='string', |
| default='stats_test.txt', |
| help=('Path to the temporary stats file to be created and ' |
| 'used for the test video file. Default: %default')) |
| parser.add_option('--stats_file', type='string', |
| help=('DEPRECATED')) |
| parser.add_option('--yuv_frame_width', type='int', default=640, |
| help='Width of the YUV file\'s frames. Default: %default') |
| parser.add_option('--yuv_frame_height', type='int', default=480, |
| help='Height of the YUV file\'s frames. Default: %default') |
| options, _ = parser.parse_args() |
| |
| if options.stats_file: |
| options.stats_file_test = options.stats_file |
| print ('WARNING: Using deprecated switch --stats_file. ' |
| 'The new flag is --stats_file_test.') |
| |
| if not options.ref_video: |
| parser.error('You must provide a path to the reference video!') |
| if not os.path.exists(options.ref_video): |
| parser.error('Cannot find the reference video at %s' % options.ref_video) |
| |
| if not options.test_video: |
| parser.error('You must provide a path to the test video!') |
| if not os.path.exists(options.test_video): |
| parser.error('Cannot find the test video at %s' % options.test_video) |
| |
| if not options.frame_analyzer: |
| parser.error('You must provide the path to the frame analyzer executable!') |
| if not os.path.exists(options.frame_analyzer): |
| parser.error('Cannot find frame analyzer executable at %s!' % |
| options.frame_analyzer) |
| return options |
| |
| def _DevNull(): |
| """On Windows, sometimes the inherited stdin handle from the parent process |
| fails. Workaround this by passing null to stdin to the subprocesses commands. |
| This function can be used to create the null file handler. |
| """ |
| return open(os.devnull, 'r') |
| |
| def DecodeBarcodesInVideo(options, path_to_decoder, video, stat_file): |
| # Run barcode decoder on the test video to identify frame numbers. |
| png_working_directory = tempfile.mkdtemp() |
| cmd = [ |
| sys.executable, |
| path_to_decoder, |
| '--yuv_file=%s' % video, |
| '--yuv_frame_width=%d' % options.yuv_frame_width, |
| '--yuv_frame_height=%d' % options.yuv_frame_height, |
| '--stats_file=%s' % stat_file, |
| '--png_working_dir=%s' % png_working_directory, |
| ] |
| if options.zxing_path: |
| cmd.append('--zxing_path=%s' % options.zxing_path) |
| if options.ffmpeg_path: |
| cmd.append('--ffmpeg_path=%s' % options.ffmpeg_path) |
| |
| |
| barcode_decoder = subprocess.Popen(cmd, stdin=_DevNull(), |
| stdout=sys.stdout, stderr=sys.stderr) |
| barcode_decoder.wait() |
| |
| shutil.rmtree(png_working_directory) |
| if barcode_decoder.returncode != 0: |
| print 'Failed to run barcode decoder script.' |
| return 1 |
| return 0 |
| |
| def main(): |
| """The main function. |
| |
| A simple invocation is: |
| ./webrtc/tools/barcode_tools/compare_videos.py |
| --ref_video=<path_and_name_of_reference_video> |
| --test_video=<path_and_name_of_test_video> |
| --frame_analyzer=<path_and_name_of_the_frame_analyzer_executable> |
| |
| Notice that the prerequisites for barcode_decoder.py also applies to this |
| script. The means the following executables have to be available in the PATH: |
| * zxing |
| * ffmpeg |
| """ |
| options = _ParseArgs() |
| |
| if options.barcode_decoder: |
| path_to_decoder = options.barcode_decoder |
| else: |
| path_to_decoder = os.path.join(SCRIPT_DIR, 'barcode_tools', |
| 'barcode_decoder.py') |
| |
| if DecodeBarcodesInVideo(options, path_to_decoder, |
| options.ref_video, options.stats_file_ref) != 0: |
| return 1 |
| if DecodeBarcodesInVideo(options, path_to_decoder, |
| options.test_video, options.stats_file_test) != 0: |
| return 1 |
| |
| # Run frame analyzer to compare the videos and print output. |
| cmd = [ |
| options.frame_analyzer, |
| '--label=%s' % options.label, |
| '--reference_file=%s' % options.ref_video, |
| '--test_file=%s' % options.test_video, |
| '--stats_file_ref=%s' % options.stats_file_ref, |
| '--stats_file_test=%s' % options.stats_file_test, |
| '--width=%d' % options.yuv_frame_width, |
| '--height=%d' % options.yuv_frame_height, |
| ] |
| frame_analyzer = subprocess.Popen(cmd, stdin=_DevNull(), |
| stdout=sys.stdout, stderr=sys.stderr) |
| frame_analyzer.wait() |
| if frame_analyzer.returncode != 0: |
| print 'Failed to run frame analyzer.' |
| return 1 |
| |
| return 0 |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |
